Answer:
Option C is correct.
Step-by-step explanation:
Let x be the distance cover by Michelle
Given:
A circle diameter is 3 miles.
And Michelle biked around the trail 4 times.
We know that
The circumference of a circle.
circumference = ----------(1)
where
miles
Put and r value in equation 1.
The circumference of a circle is 9.42 miles.
And Michelle biked 4 times, that is equal to 4 circumference.
.
That is equal to 38 miles.
Therefore, Michelle biked around 4 trail is 38 miles.
Answer:
The mass of each passenger is 550 kg.
The mass of front decoration is 200 Kg.
Step-by-step explanation:
Given : A roller coaster train with 6 passenger cars and the front decoration has a mass of 3500 kg. when the train has the front decoration and only 4 passenger cars, it has a mass of 2400 kg.
To find : What is the mass of the decoration and of each passenger car?
Solution :
Let the mass of each passenger is x.
Let the mass of front decoration is y.
Mass of 6 passengers and front decoration = 3500 kg.
The equation form is ..........[1]
Mass of 4 passengers and front decoration = 2400 kg.
The equation form is ........[2]
Solving equation [1] and [2]
Subtract equation [2] from [1],
Put value in [1],
Therefore, The mass of each passenger is 550 kg.
The mass of front decoration is 200 Kg.